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Optical Systems

Erroneous-erasure-preventing-apparatus

Mold for direct press molding of optical glass element

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Materials for use as cathodes in lithium electrochemical cells

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Cell electrolyte solvent, cell electrolyte comprising the solvent and non-aqueous electrolyte battery comprising the electrolyte

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Erroneous erasure preventing apparatus

Details

Inventors: Takahashi, Kiyoshi;
Assignee: Sony Corporation (Tokyo, JP)
Primary Examiner: Konick; Bernard
Assistant Examiner: Stefanski; Paul
Attorney, Agent or Firm: Hill, Van Santen, Steadman & Simpson

An erroneous erasure preventing piece to be detected is formed simultaneously with disk cassette covers by a molding process. The piece has a configuration which enables it to be slidably remounted to the cassette disk covers after being torn off the cover.

DETAILED DESCRIPTION It is a primary object of the present invention to provide a new accidental erasure preventing system for use on a cassette for magnetic media.
It is a secondary object of the present invention to provide a novel accidental erasure preventing apparatus in which a detecting piece is slidably remountable on a cassette case.
It is a further object of the present invention to provide a slidably remountable detecting piece of an accidental erasure preventing system together with a corresponding portion of an upper or lower half of the case formed simultaneously by a molding process.

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